Blackboard chalk-rack.



ANSON MOD. WILSON, OF MOVVEAQU'A, ILLINOIS.

BLACKBOARD CI-IALK-RACK.

Specification of Letters Patent.

Patented Mar. 12, 1918.

Application filed ctober 24, 1917. Serial No. 198,221. i

To all whom it may concern.'

Be it known that I, ANsoN MGD. VVrLsoN, a citizen of the United States,residing at Moweaqua, in the county of Shelby and State of Illinois,have invented certain new and useful Improvements in BlackboardChalk-Racks; and I do hereby declare the following to be a full, clear,and exact description of the invention, such as will enable othersskilled in the art to which it appertains to make and use the same.

This invention relates to improvements in blackboard chalk racks.

The object of this invention is to provide a rack to be used inconnection with the blackboard for catching the chalk dust falling fromthe board and from the brush used for cleaning olf the board.

A further object of this invention is to provide a chalk rack with alongitudinally extending recess in which is secured a tank over which isarranged a porous cover so as to permit the dust to freely fall from theboard into the trough or tank and prevent the dust from flying about theroom thus increasing the sanitation of school rooms.

A still further object of this invention is to provide a blackboard witha chalk rack which has a longitudinally extending recess in its upperside, a liquid containing tank removably tted in the recess, aforaminous cover hingedly secured to the tank and overlying the same andis reinforced so as to permit the blackboard erasers to be rubbed overthe cover so that the dust accumulated on the erasers may be forced intothe tank and the liquid in the tank will prevent the dust from flyingabout the room.

A still further object of this invention is to provide a blackboardchalk rack of this character, which will be simple, practical andcomparatively inexpensive in construction and one that can bemanufactured and sold at a low cost.

With these and other objects in view the invention consists in the novelcombination and arrangement of parts hereinafter more fully describedand set forth in the claims hereto appended.

In the drawing:

Figure l is a fragmentary top plan View partly in section of ablackboard chalk rack, made in accordance with this invention7 Fig. 2 isa fragmentary perspective view of the same, and y Fig 3 is a verticaltransverse sectional view.

Like numerals of reference designate corresponding parts in all thefigures of the drawing.

Referring to the drawing, the numeral 5 designates the wall of a schoolroom 'to which is secured the usual type of blackboard 6 whichblackboard and wall has secured thereto the rack 7. The rack is providedin its upper side with a longitudinally extending recess 8 which formsa. rear shoulder 9 and front shoulder 10. The rear shoulder 9 isprovided in its upper side with a recess l1 in which the lower end ofthe blackboard 6 is adapted to be fitted thus positioning the front faceof the blackboard flush with the upper edge of the shoulder 9 asillustrated in Fig, 2. The front shoulder 10 is cut away on its innerside as at 12 to provide a shoulder 13 which is in a horizontalalinement with the upper edge of the shoulderl 9 as illustrated in Figs.2 and 3 of the drawing.

A metal tank 14: is removably litted in the recess 8 of the rack 7 andthis tank has laterally extending flanges' 15 which are adapted to restupon the upper edge of the shoulder 9 and horizontal shoulder 13, thusholding the tank in a horizontal alinement within the recess 8 of therack. The edge of the flange 15 resting upon the shoulder 9 is inabutting engagement with the front surface of the blackboard 6, thus thechalk dust erased from and dropping from the blackboard surface willaccumulate in the tank 14.

The tank is adapted to have therein a suitable liquid designated A,which liquid is adapted to prevent the chalk dust after accumulating inthe tank from rising therefrom and scattering or blowing about the roomas is now the case in the general types vof blackboard racks in use.

A foraminous cover 16 includes the spaced parallel longitudinallyextending` bars 17 which are connected together by the relatively spacedtransversely extending bars 18. The bars 17 and 18 have secured theretothe foraminous material 19, which material is so secured to the bars asto be remorced and permit the erasers to be rubbed over the surface 19Without causing the surface 19 to sag into the tank 14 and thuspermitvthe chalk dust in the erasers to be cleaned therefrom anddeposited in the tank 14.

One of the bars 17 is adapted to be hingedly secured in the eyes 2()formed integrally with the upper side of the iiange 15 and the flangeWhich rests upon the upper edge of the shoulder 9 thus permittingthecover to be swung to open position to permit the tank to be removed fromthe recess and emptied of its contents and cleaned so as to be replacedand filled With a suitable liquid for the purpose described.

A ring 21 is secured in the cover 16 so as to permit the cover to beraised when it is desired to remove the tank 14 from its posi tionWithin the recess 8 or' the rack.

In use, the tank is lled With a suitable liquid after it has beenpositioned in its recess, ythe cover is forced to a closed position asillustrated in Figs. 2 and 3 and upon the operation of the erasers overthe surface of the blackboard the dust accumulating or falli-ng from theboard will be deposited in the tank 14 and Will mingle with the liquidin the tank and'thus be prevented from Iiying from the tank due tovibration or jarring of the board.

When it is desired to empty the tank, it is only necessary to open thecover, remove the tank from its recess and dump its contents therefromand replace in the tank new liquid and place the tank back in itsposition Within the recess and the device is ready for use again. f

Having thus described my invention, what I claim is:

l. In combination, a blackboard, a rack Gopis of this patent may beobtained for ve cents each, by addressing the secured to the blackboard,said rack having a recess in its upper side forming front and rearshoulders, the front shoulder having` a cut away portion on its innerside to provide a horizontal alined shoulder With the upper edge of therear shoulder, a tank removably fitted in the recess and havinglaterally extending iianges engaging the horizontally alined shouldersof the front and rear shoulders, and a reinforced oraminous coverhingedly secured to the iange of the tank to overlie and cover the tank,as and for the purpose specified.

2. In combination, a blackboard, a rack therefor, said rack providedWith a longitudinally extending recess in its upper side providing frontand rear Shoulders, the rear shoulder having a recess in its upper sideto provide a socket tor the lower edge of the blackboard, the frontshoulder provided with a cut out portion providing a shoulder aliningwith the upper edge of the rear shoulder, a tank fitted in thc recess,ianges carried by the tank and engaging the upper edge of the rearshoulder and the shoulder formed by the cut out portion on the frontshoulder,and a cover, said cover comprising spaced longitudinallyextending parallel rods connected together by transverse rods, and aforaminous body secured to the rods, one of said rods being hingedlysecured to one flange of the tank and the opposite rods lying upon theother flange to permit the cover to overlie the tank.

In testimony whereof I aix my signature in presence of tvvo Witnesses.

ANSON MCD. WILSON. Vitnesses:

CHAS. HOWARD, Jr., C. M. SNYDER.

Commissioner of Patents,

Washington, D. C.

